I found this useful:
--- In Zen_Forum@yahoogroups.com, siska_...@... wrote:
> Hi Bill,
> Actually one of the things that raised my interest in Zen is koans.
> > Don't try to 'understand' the koans.
> That explains why I never really understand what the koans are trying
to tell. Yet I don't care, I just like them. Some say koans are not to
be interpreted and analysed. I quite agree as the interpretations can
sometimes be rather absurd.
> > Just observe (through reading) the communication techniques
> I don't really get this. You mean something like the pond and frog